XI Physics Projectile and Circular Motion Online Test Mdcat-2024

1. If the mass of body is halved and its tangential velocity is doubled then:

2. If a rotating body is moving counterclockwise, the direction of angular velocity will be:

3. A flywheel at rest is to reach an angular velocity of 36 rad.s^‑1 in 6 seconds, with a constant angular acceleration. The total angle turned through during this interval is:

4. In 1.0 s, a particle goes from point A to point B, moving in a semicircle of radius 1.0 m (see figure). The magnitude of the average velocity is:

5. Which of the following is not an expression for angular momentum:

6. The angular velocity of a rolling tyre making 120 revolutions per minute is:

7. Two bodies of masses 10 kg and 5 kg are moving in circles of radius RRR and rrr such that their time period is the same. The ratio between their centripetal accelerations is:

8. The angular velocity of an object moving in a circle of radius r with a constant speed of v is:

9. The angular displacement in circular motion is:

10. Which of the following factors remains unchanged in uniform circular motion:

11. If a body is rotating clockwise with decreasing angular velocity, its angular acceleration is directed:

12. In circular motion, if the tangential velocity of the body doubles, then the centripetal force becomes:

13. The number of revolutions in 5π radians is:

14. Initially, a wheel is at rest. Its angular velocity increases uniformly and becomes 60 rad/sec in 5 sec. The total angular displacement is:

15. A wheel completes 2000 rotations in covering a distance of 12.5 km. The diameter of the wheel is:

16. The ratio of the angular speed of the second hand to the hour hand of a clock is:

17. A person sitting on a rotating stool suddenly outstretches his arms. Then,

I. Angular velocity increases
II. Moment of inertia increases
III. Angular momentum increases
IV. Angular momentum remains the same

18. In non-uniform circular motion, a body possesses:

19. The acceleration produced due to a change in direction in uniform circular motion is:

20. In uniform circular motion, the angle between centripetal acceleration and the velocity vector is:

21. In uniform circular motion, the angle between centripetal acceleration and the radius vector is:

22. The maximum velocity after which a car can skid while moving on a circular track of radius 100 m, given that the coefficient of friction between the road and the tires is 0.2, is:

23. A 500 kg car takes a round turn of radius 50 m with a velocity of 36 km/hr. The centripetal force acting on the car is:

24. When a body moves with constant speed in a circle:

25. If a particle moves in a circle covering equal angles in equal time, its velocity vector:

26. A stone of mass 2 kg is projected at an angle of 60⁰ with a velocity of 30 m/s. Its total kinetic energy at the highest point of the trajectory is:

27. At the top of the trajectory of a projectile, the angle between the total velocity and acceleration of the projectile is:

28. At an angle of 76⁰ for a projectile, the range of the projectile will be equal to:

29. A ball is projected with a velocity of 10 m/s at an angle of 60⁰ with the vertical. The time taken by the projectile to reach the point of arrival (g = 10 m/s²) is:

30. The range of a projectile will increase ____ times if the velocity increases √3 times:

31. The angles at which a projectile has maximum and minimum ranges are:

32. In projectile motion, the range is covered due to:

33. The direction of motion of a projectile fired horizontally from some height will be perpendicular to the vertical axis when:

34. A food box is dropped from a helicopter moving at a speed of 30 m/s from a height of 45 m. Where will the box hit the ground?

35. If the velocity of a projectile is doubled, which of the following is correct:

I. Its range will be four times
II. Its maximum height becomes four times
III. Its total time of flight becomes four times

36. A body is projected at an angle to the horizontal, having a range of 300 m. If the time of flight is 6 seconds, the horizontal component of velocity is:

37. A projectile is projected with 60 m/s at an angle of 30⁰ with the horizontal. Its Y component of velocity after 2 seconds of motion is:

38. In projectile motion, acceleration in the x direction is zero because:

39. If the time of flight of a projectile is 6 seconds, it will cover its maximum range in:

40. If the time of flight of a projectile is 6 seconds, it will reach its maximum height in:

41. The angles at which a projectile covers half of its maximum range are:

42. The Y component of a projectile during its motion is:

43. Air friction is a resisting factor for a projectile mainly affecting:

44. The velocity of a projectile at the highest point of its motion is:

45. In projectile motion launched from Earth's surface at any angle, the velocity is zero:

46. An example of projectile motion:

47. A projectile is thrown with an initial velocity of 100 m/s at an angle of 60⁰ with the horizontal. What will be the horizontal component of its velocity?

48. A projectile covers a range of 5 m when it is launched at an angle of 15⁰. What will be the range of that projectile when launched at an angle of 45⁰?

49. A stone is thrown with a vertical component of velocity as 98 m/s. How much time will it take to come back?

50. A ball is released from height h and another from 4h. The ratio of time taken by the balls to reach the ground is: